Change-gearing.



.PATENTBD MAR. l2, 190'7.

A. H. EHLE.

CHANGE GEARING.

APPLI-OATION FILED 0UT.16. 1906.

2 SHEETS-SHEET 1.

No. 347,048. PATBNTED MAR. 1,`1 9o'7.I

y A. 1Ll 121m:` GRANGE GEARING.

APPLICATION FILED 0U.l.16. 1906.

@www ww UNIrED sTArEs PATENT oPFIoE.

Specification of Letters Patent.

Patented March 12, 1907.

Application led October 16. 1906. Serial No. 339.186.-

To all whom it may concern:

Beit known that I ARCHIBALD HYDE EHLE, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Change-Gearing,J of which the following is a specification.

The object of my invention is to improve the construction of change-gearing mounted between a driving and a driven element of a machine.

M invention is particularly adapted for use in connection with a motor-driven cartruek, such as that illustrated in my application for patent for a motor-driven truck, filed Oc-tober 16, 1906, Serial No. 339,187.

In the accompanying drawings, Figure 1 is a sectional plan view on the line 1 1, Fig. 2, illustrating my improved changecaring. Fig. 2 is a sectional elevation on the ine 2 2, Fig. 1. Fig. 3 is a plan view showing the mechanism for shifting the clutches o the speed-gearing.

Ais a frame havin boxes a a for the two shafts B and D an also bearings for the driving-shaft C. The bearings in this instance are ball-bearings, and'each bearing consists of two ringsi t ,between which are mounted the balls i2; lbut-it will be understood that other types of bearing may be used without departing from the essential feature of my invention. The shaft C is con nected to an engine or other motor and has a bevel-pinion c mounted thereon. The shaft B has a central squared portion to receive a clutch-sleeve b, toothed at each end, and mounted on the cylindrical portion ofthe shaft on each side ofthe center are bevel- 'gear-wheels b b2, which mesh with the bevel pinion c on the shaft C. The inner surface of each bevel-wheel is toothed to engage the toothed end of the sleeve b when the said sleeve is shifted to the right or left, so that the sllevcle and shaft will be driven by the gear- W ee When the sleeve is in the central osition,I

as shown in Fig. 1, the gearing is etached from the driving mechanism; but when the sleeve is shifted,so as to throw its teeth in enagement with the teeth of 'the bevel-wheel then the gearin is driven in one direction. when it is shifte to glear with the teeth of the wheel b,y it is turne in the opposite direction. Therefore the clutch b is for the purpose 'l of reversing the direction of movement of the shaft or throwing it out of gear entirely.

On the shaft between the bearings and the hubs of the gear-wheels b b are gear-wheels e e', both keyed to the shaft B, the wheel e being greater in diameter than the Wheel e. I preferably mount thrust-bearings i3 of the ball type on) the extended hubs of the Wheels e e. 'lhese bearings are similar in construction to the ball-bearings a a. 0n the central squared portion of the shaft D is a clutchsleeve d, and on the cylindrical portion of the shaft at each side ofthe squared portion are gear-wheels d d2. These wheels are loose on the shaft vand their teeth mesh with the wheels e e', respectively-- The clutch-sleeve d has teeth at each end which engage with teeth on the hubs of the Wheels d' d, so as to lock either one or the other of the wheels to the shaft.

It will be noticed in referring to the draw ings that the wheel e is less in diameter than the wheel e and the wheel d on the shaft D is less in diameter than the wheel d2, which meshes with the small wheel e By this arrangement the speed of the shaft D can be changed by coupling one or other of the Wheels d or d2 to the shaft D on shifting the sleeves d. When it is 'wished to drive the shaft D at a high speed, then the clutch-sleeve d is shifted so as to lock with the Wheel d. If a slow speed is desired then the sleeve is shifted so as to lock with the teeth of the Wheel d2. This gearing is intended for very hea work. Instead of keying the sleeves to the shafts I preferably shape the shafts so `that the sleeves will be free to slide on the shafts, but must turn with them. In the present instance the central section of each shaft is squared, and the o ening through each sleeve is s nare to fit t e shaft. This makes a very su stantial construction.

It will be noticed in referring to the drawings that the large gear-Wheels are preferably made in sections-a hub-section and a rim- 4sectionthe two sections being bolted to vgether; but it will be understood that each wheel may be made in a single piece without departing from my invention. The earing is lpreferably inclosed by a cap A', W ich is bo ted to the base Ain any suitable manner. The cap in the present instance forms with the base a means for clamping the bearingboxes in position. By using a construction of this type the gearing may work in oil, if desired, as' the lower portion of the casing is tight, seas to 'hold a quantity of oil or other lubricant'.

In order to properly shift the two sleeves band d, I'mount t'Wo spindles F and G in bearings in the box, the spindles. passing 'through beari-ngs a2 in the cover A and in step-bearings a in the bottom of the base A, as indicated in Fig. 2, and on these spindles are forked arms f and g, respectively, which are coupled to rings f and g', mointed in the grooves in the sleeves b and d. On the upperend ofthe spindle F is an arm F", held in its central position by springs f2, one on each side of the arm, as clearly illustrated in Fig. 3, and connected to the arm isa rod h,

having at eachv end a piston mounted in a, cylin er H, the valve in this cylinder being preferably controlled by any suitable electrical device. 0n the end `of the shaft G is an arm G', held in the central position by two springs g2, similar to the arm F', and coupledto the arm is a rod h having pistons mounted in the cylinders H, one on each side of the arm, as indicated in Fig. 3, and the valves of these. cylinders are i preferably actuated by electrical mechanism similar tothe valves of the cylinders H. @ne form of this mechanism is illustrated and described in my mount the gear on a truck, for instance, the

shaft may then be a driving-axle for the truck. Thus it will be seen that by shifting the clutch-sleeve b the direction of movement' of the shaft -D can be reversed at will, orthe mechanism can be thrown out of gear entirely, and by shifting the clutch-sleeve 'd the speed can be changed. Thus I am enabled to make a very simple and powerful change-gear which is especially applicable for use in transmittin power from an engine to the drivingwheels of a motor driven 1. The combination of a frame, an inter-' mediate shaft and a driving-shaft arranged arallel with each other and -mounted in earhgs in the said frame, a driving-shaft arran e at right angles to said shafts and in a central position in respect thereto, a lbevelfpinion mounted on the said shaft, the intermediateshaft having a squared portion, a

sleeve mounted on the squared portion so as to slide on but turn with the shaft and having teeth at each end, bevel-wheels mounted on the cylindrical portions of the shafts, one on each side of the squared portion and meshing with the bevel-pinions of the drivingshaft, said wheels having teeth on their faces arranged to engage theteeth of the clutchsleeve, gear-wheels of different diameters, one secured to one end of the intermediate shaft and the othersecured to the opposite end of the intermediate shaft between the Vbevel-wheels and the bearings, a driven shaft having a central squared portion, a long sleeve mounted on the squared portion having teeth at each end, gear-wheels Vloosely mounted on '.the cylindrical portions of the said shaft on each side of the squared portion, said wheelsdiffering in diameter so as to mesh with the Wheels on the intermediate shaft, and means* substantially as 4pinion mounted `on the said shaft, the intermediate shaft having a squared portion, a sleeve mounted on the squared portion so as to slide on lbut turn with the shaft and having teeth at each edge, bevel-wheels mounted on the cylindrical portions 4of the shafts, one on eachside of the squared portion andmeshing with the bevel-pinions of the drivingshaft, said wheels having teeth on their faces arranged to enga e the teeth of the clutchsleeve, gear-whee s of different diameters, one secured to one end of the intermediate shaft and thel other secured to the opposite end of the intermediate shaft between the bevel-wheels andthe bearings, a driven shaft having a central squared portion, a long sleeve mounted onthe squared portion having teeth IOC at each end, gear-wheels loosely mounted on the cylindrical portions of the said shaft on each side of the squared portion, said wheels differing in diameter so as to mesh with the wheels on the intermediate shaft, and means for shifting the two sleeves, said driven shaft extending beyond the bearings 'on each side, and sprocket-wheels `mounte on the extensions of the shaft, substantially as described. 3. The combination in a change-gear, of a frame, a driving-shaft mounted in bearings in the frame, a bevel-pinion thereon, an intermediate shaft,ball-bearings on the frame for the said intermediate shaft, a clutch-sleeve mounted on the central ortion of the said shaft so -as to turn with ut slide upon the' shaft,V two bevel-Wheels. loose on the shaft and meshing with the dri pinion, two gear-Wheels one on each end o t e shaft between the bearin -boXes and the hubs of the bevel-wheels, sai-gear-wheels bein .of differ- .ent' diameter and having exten ed hubs,I

IIOV

thrust-bearings mounted on the extended i In testimony whereof I have signed my hubs of the said gear-wheels, each of said name to this s'pecicaton in the presence of ro vb?rixlilgsbeonsistinof' twodrings anhgfa series two subscribing witnesses.

o e s etween t em, a. rven s t, earl v -5 wheels on the shaft meshin with thel ear- ARCHIBALD HYDE wheels on the intermediate s aft, and-means Witnesses:

for locking one or other of the gear-wheels to WILL A. BARR the driven shaft, substantially as described. E. R. LOUGHERY. 

